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SMB3: Fix persistent handles reconnect 

When the client hits a network reconnect, it re-opens every open
file with a create context to reconnect a persistent handle. All
create context types should be 8-bytes aligned but the padding
was missed for that one. As a result, some servers don't allow
us to reconnect handles and return an error. The problem occurs
when the problematic context is not at the end of the create
request packet. Fix this by adding a proper padding at the end
of the reconnect persistent handle context.

Cc: Stable <stable@vger.kernel.org> # 4.19.x
Signed-off-by: Pavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Pavel Shilovsky 2019-11-06 13:58:15 -08:00 committed by Steve French
parent a99d8080aa
commit d243af7ab9
1 changed files with 1 additions and 0 deletions
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fs/cifs/smb2pdu.h
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@ -838,6 +838,7 @@ struct create_durable_handle_reconnect_v2 {
struct create_context ccontext;
__u8 Name[8];
struct durable_reconnect_context_v2 dcontext;
__u8 Pad[4];
} __packed;
/* See MS-SMB2 2.2.13.2.5 */